When to plant tomato in Christchurch
Tomato is frost-tender, so every date keys off Christchurch's last spring frost of Oct 16.
Step 1 · Sow
Start seeds indoors
Sep 26 – Oct 17
Before your last frost, on a warm windowsill or heat mat.
Step 2 · Plant
Transplant outdoors
Dec 21 – Jan 11
Once frost risk has passed and nights stay mild.
Step 3 · Harvest
Harvest window
Feb 19 – Mar 16
Picking runs until conditions turn against the crop.
Window
Days to maturity
60 – 85 d
Christchurch's 211-day season leaves this much room.
Tomato on Christchurch's growing year
Frost-bounded season with crops mapped onto the 12-month axis.
Frost risk Growing Harvest
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
FROST
OCT 16
MAY 19
Common questions
When will tomato be ready to harvest in Christchurch?
Expect to harvest from around mid February (Feb 19–Mar 16) in Christchurch, based on its local frost dates. Confidence 40%.
When should I start tomato seeds indoors in Christchurch?
Start seeds indoors around late September (Sep 26–Oct 17) in Christchurch, based on its local frost dates. Confidence 43%.
When can I transplant tomato outdoors in Christchurch?
Transplant outdoors around late December (Dec 21–Jan 11) in Christchurch, based on its local frost dates. Confidence 44%.
How long is the growing season in Christchurch?
Christchurch has roughly 211 frost-free days, which is enough time to grow tomato to maturity outdoors.
The rule of thumb
Sow tomato 6–8 weeks before your last spring frost; plant out 2–3 weeks after it. Every date on this page is derived from that rule and Christchurch's frost dates.
Confidence 45/100 · Curated · based on NASA POWER (modeled) 1991–2020 · frost dates are probabilities, not guarantees.